Writing instrument



FIG. 1 is a perspective view showing my new design for a writing instrument;

FIG. 2 is a front view of the writing instrument of FIG. 1;

FIG. 3 is a right side view of the writing instrument of FIG. 1;

FIG. 4 is a rear view of the writing instrument of FIG. 1;

FIG. 5 is a left side view of the writing instrument of FIG. 1;

FIG. 6 is a top plan view of the writing instrument of FIG. 1; and,

FIG. 7 is a bottom plan view of the writing instrument of FIG. 1.

The broken lines in the drawings illustrate unclaimed portions of the writing instrument and form no part of the claimed design. 

CLAIM The ornamental design for a writing instrument, as shown and described. 